Adds 6 Rounds to 9mm and 5 rounds to .40acp & .357 Glock's Magazines! 
Works on 19X, 17, 17L, 18, 22, 24, 31, 34, 35, 37, 45 & 47
Stainless steel extra power magazine spring included
Rounded ergo design
Positive mag seating
Extraction Traction Points
Debris extraction ports
Superior tough construction
No more painful corner spikes in your palm
 
THIS DOES NOT PASS USPSA LENGTH FOR LIMITED OR CARRY OPTICS AT 141.25 MM
YOU WILL GET BUMPED TO OPEN FOR THIS EXTENSION